957 resultados para National Research Council (U.S.). Highway Research Board
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Mode of access: Internet.
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"OPM-NPC-03."
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"OPM-NPC-06."
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Cover title.
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April 1981.
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Vol. 2: Report of the National research council to the National resources planning board.
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For earlier reports see U. S. Public Health Service. Publications nos. 738, 812, 914, 1546 and 1720. (RA 11 B155-)
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Expert panels have been used extensively in the development of the "Highway Safety Manual" to extract research information from highway safety experts. While the panels have been used to recommend agendas for new and continuing research, their primary role has been to develop accident modification factors—quantitative relationships between highway safety and various highway safety treatments. Because the expert panels derive quantitative information in a “qualitative” environment and because their findings can have significant impacts on highway safety investment decisions, the expert panel process should be described and critiqued. This paper is the first known written description and critique of the expert panel process and is intended to serve professionals wishing to conduct such panels.
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A study was done to develop macrolevel crash prediction models that can be used to understand and identify effective countermeasures for improving signalized highway intersections and multilane stop-controlled highway intersections in rural areas. Poisson and negative binomial regression models were fit to intersection crash data from Georgia, California, and Michigan. To assess the suitability of the models, several goodness-of-fit measures were computed. The statistical models were then used to shed light on the relationships between crash occurrence and traffic and geometric features of the rural signalized intersections. The results revealed that traffic flow variables significantly affected the overall safety performance of the intersections regardless of intersection type and that the geometric features of intersections varied across intersection type and also influenced crash type.
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National Highway Traffic Safety Administration, Washington, D.C.
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Bibliography: p. 103-143.
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Federal Highway Administration, Washington, D.C.
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"August 8, 1995"--P. [1].
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Mode of access: Internet.
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Mimeographed.